S4=Stuart, _Royalty_for_Commoners_, 4th ed.  Caveat emptor @ 92-35

The cited information was published by 2002, Genealogical Publishing Co., Inc., 1001 N. Calvert St., Baltimore, MD 21202, held in {REPO79} (Ref: 92-35) The author/originator was Roderick W. Stuart.
S4=Stuart, _Royalty_for_Commoners_, 4th ed.  Caveat emptor. 

• Source Notes

  ISBN 0-8063-1687-X
  Library of Congress Catalogue Card Number 2001 135382
  "The Complete Known Lineage of John of Gaunt, Son of Edward III, King of England, and Queen Philippa
  
  Source Media Type: Book

• References (2)
  • Parent Source: S4=Stuart, _Royalty_for_Commoners_, 4th ed.  Caveat emptor
  • Individual: Princess Gerberga De Saxony Of The Holy Roman Empire